Preventing smoke in furnaces.



V PATBNTED JAN. "13, 1903. J. w Lsomxsz J. 3. KBMP-WELGH. PREVENTING SMOKE IN FURNACE-S.

APPLICATION TILED-AUG. 11, 1902.

H0 MODEL.

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UNITED STATES PATENT OFFICE.

JAMES WILSON AND JOHN STENHOUSE KEMP-WELCI-I, OF WANDSWORTH,

ENGLAND.

YPREVENTING SMOKE IIN FURNACES.

SIBEGIFICATION formingpart of Letters Patent No. 718,234, dated January 13, 1903.

. Application filed August 11, 1902. Serial No. 119,312. (No model.)

To all whom, it nuty concern:

Be it known that we, JAMES WILSON, engineer, residing at Ferrier Works, North street, and JOHN STENHOUSE KEMP-WELOH, engineer, residing at Bell Lane Iron Works, both of Wandsworth, in the county ofSurrey, England, subjects of the King of Great Britain, have invented a certain new and useful Improvement in Preventing Smoke in Furnaces, of which the following is a specification.

The object of this invention is the prevention of smoke in furnaces, especially when fuel is being put on the fire. For this purpose gas is continuously supplied to a number of furnaces by pipes leading from a main common to them all. On each supply-pipe there is a valve which .is normally closed, the supply being then through a by-pass of comparatively small area. When, however, any one of the furnaces is being fed, its valve is opened, thus increasing the supply. Each gas-supply pipe is surrounded by an air-pipe, so that the gas induces a supply of air.

Figure 1 is an elevation of two steam-boilers, each having a pair of furnaces fitted according to this invention. Fig. 2 is a longitudinalsection of one of the furnaces. Figs. 3, 4, and 5 show details to a larger scale.

a represents the fire-bars; b, the bridge.

dis a gas-main, and e represents branch pipes from it. frepresents cocks on the pipes e.

j represents air-pipes surrounding the gaspipes e, and 7c,Figs. 3and 4, represents valves on them which work with the gas-cocks f, be-

.ing connected to them by chains 1.

m, Fig. 5, represents earthenware nozzles on the ends of the pipes e.

n represents by pass pipes around the cocks f, and 0 represents cocks on them.

We claim 1. The combination of a number of coalburning furnaces, a gas-main,- branch pipes leading from the main and extending into the interior of the furnaces, cocks in the branch pipes which are normally closed and which are opened when fuel is being supplied to the furnaces, by-passes around the cooks which are open at all times to provide fuel for constantly-burning flames within the furnaces, air-pipes surrounding the gas-pipes and discharging .near the ends thereof Within the furnaces, valves on the air-pipes, and means for opening and closing the cooks of the gaspipes and the valves of the air-pipes, simultaneously and proportionately, substantially as described.

2. The combination of a number of coalburning furnaces, a gas-main, branch pipes leading from the main extending into the interior of the furnaces and discharging near the bridge-wall thereof, cocks in the branch pipes which are normally closed but which are opened when fuel is being supplied to the furnaces, by-passes around the cooks which are open at all times to provide fuel for constantly-burning flames within the furnaces, air-pipes surrounding the gas-pipes and discharging near the ends thereof within the furnaces, valves on the air-pipes, and means for opening and closing the cooks of the gaspipes and the valves of the air-pipes simultaneously and proportionately, substantially as described.

JAMES WILSON. JOHN STENHOUSE IiEllIP-WELCH.

Witnesses:

ROBERT E. RANSFORD, FREDK. O. WEATHERLY. 

